ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
TRANSIENT TEMPERATURE RESPONSE DURING HEATING OF AN INITIALLY LIQUID SATURATED PLANE POROUS WALL
Sinopsis
Analytical solutions to the partial differential
equation for temperature distribution in the
dried out portion of an initially liquid saturated
porous solid medium is presented. The solution is
given for the case of a liquid saturated infinite
plane porous wall of finite thickness initially at
the uniform saturation temperature of the liquid,
suddenly subjected to a constant surface heat flux.
In addition to the transient temperature distribution,
the position of the receding liquid-vapor
interface is analytically determined as function of
time. Experimental measurements of the temperature
variation with position and time in the dried out
portion of the porous wall are compared with data
determined by analytic solution. The porous structural
materials tested covered a range of density
from 1587 ≤ ρS ≤ 25440 kg/m3, of thermal conductivity
from 1.23 ≤ λS 10.0 W/mK, of porosity from
17 ≤ P ≤ 43% of heat flux from 20,000 ≤ q0 ≤ 73,000
W/m2. The agreement between experimental and
analytic data is generally good.